US9644508B2 - Liquid filter with a filter bypass valve and with a central discharge duct, and filter insert for a liquid filter - Google Patents

Liquid filter with a filter bypass valve and with a central discharge duct, and filter insert for a liquid filter Download PDF

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Publication number
US9644508B2
US9644508B2 US14/411,421 US201314411421A US9644508B2 US 9644508 B2 US9644508 B2 US 9644508B2 US 201314411421 A US201314411421 A US 201314411421A US 9644508 B2 US9644508 B2 US 9644508B2
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Prior art keywords
filter
valve body
liquid
insert
closing pin
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US20150337695A1 (en
Inventor
Wilhelm Ardes
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Hengst SE and Co KG
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Hengst SE and Co KG
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/03—Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/014—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements with curved filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
    • B01D35/147—Bypass or safety valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
    • B01D35/147—Bypass or safety valves
    • B01D35/1475—Pressure relief valves or pressure control valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
    • B01D35/153—Anti-leakage or anti-return valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/16—Cleaning-out devices, e.g. for removing the cake from the filter casing or for evacuating the last remnants of liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/30—Filter housing constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/30—Filter housing constructions
    • B01D35/306—Filter mounting adapter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/29—Filter cartridge constructions
    • B01D2201/291—End caps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/40—Special measures for connecting different parts of the filter
    • B01D2201/4007—Use of cam or ramp systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/40—Special measures for connecting different parts of the filter
    • B01D2201/4023—Means for connecting filter housings to supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/40—Special measures for connecting different parts of the filter
    • B01D2201/4046—Means for avoiding false mounting of different parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/40—Special measures for connecting different parts of the filter
    • B01D2201/4084—Snap or Seeger ring connecting means

Definitions

  • the present invention relates to a liquid filter, in particular an oil filter of an internal combustion engine, having a filter housing having a removable cover and having a raw liquid inlet and a clean liquid outlet, having a filter insert that is situated exchangeably in the filter housing and that separates a raw side and a clean side of the liquid filter from one another, the insert having a hollow cylindrical filter material body enclosed at its end faces by two end disks, the end disk that is the lower end disk in the installed state having a central mounting opening, the liquid filter having a filter bypass valve, for which purpose the end disk that is the upper end disk in the installed state having on its lower side a central valve seat that works together with a valve body, the filter housing further having a central discharge duct for emptying the filter housing when the filter insert is removed, and there being situated in the discharge duct a closing pin that is fixed to the housing in the installed state and that can be axially displaced between a closed position, assumed when the filter insert is installed and the cover is closed, and an open position, assumed when the cover is removed
  • a liquid filter of the type indicated above is known from DE 201 18 683 U1.
  • the closing pin extends from the discharge duct upward into the filter insert, up to the upper end disk thereof.
  • a valve body of the filter bypass valve At the upper end of the closing pin, there is situated a valve body of the filter bypass valve, this valve body being axially displaceable relative to the closing pin, and the valve body being loaded with a force that acts upward, i.e., in the closing direction of the filter bypass valve, by a spring supported on the closing pin.
  • a further spring that loads the closing pin with a force acting upward, i.e., in the direction toward the cover of the filter housing.
  • an object arises of creating a liquid filter of the type named above that avoids the indicated disadvantages and that in particular requires a lower number of individual parts, and in this way can be produced and assembled at lower cost. Moreover, a fitting, specific filter insert is to be created for the liquid filter according to the present invention.
  • the first part of this object relating to the liquid filter, is achieved by a liquid filter of the type described above that is characterized in that:
  • the present invention advantageously brings it about that the desired functioning of the filter bypass valve and discharge duct can be realized using only a single spring, without having to accept an impairment of the functioning or operational reliability of the liquid filter. In this way, the outlay in the production of the individual parts and in the assembly of the liquid filter, and thus the overall costs thereof, are reduced.
  • the liquid filter according to the present invention is robust and not sensitive to the danger of damage that can occur during possibly incorrect maintenance, because the closing pin is well protected inside the discharge duct, and only the valve body carrier connected to the closing pin runs through the filter insert.
  • valve body carrier and the valve body of the filter bypass valve are fashioned in one piece.
  • the closing pin has, in its upper end region, two or more pusher lugs that are distributed around the circumference and that protrude radially outward past the outer circumference of the valve body carrier, on which lugs the thrust force acting in the direction toward the closing position of the closing pin can be exerted by the filter insert.
  • the closing pin and the valve body carrier are held so as to be not capable of rotation relative to one another, which is advantageous for a precise mutual axial guiding.
  • actuating elements for the pusher lugs are situated on the lower end disk or on a supporting lattice of the filter insert.
  • the actuating elements can be simply integrally formed on, stably constructed, and housed in a space-saving fashion.
  • the actuating elements are formed by two or more ribs that run axially and that protrude radially inward, or by a toothed configuration having a plurality of axially running teeth that protrude radially inward.
  • a design is achieved that is stable and not liable to damage, and a spatially advantageous housing is also achieved.
  • cooperating positioning guide means are situated on the inner circumference of the filter insert and on the outer circumference of the valve body carrier, with which the filter insert can be force-guided into a correctly engaged position of its actuating elements relative to the pusher lugs when the filter insert is mounted onto the valve body carrier in the circumferential direction.
  • a particularly reliable functioning is ensured.
  • a key-lock system can be realized that prevents the insertion of foreign filter inserts that do not fit and that do not have the positioning guide means and actuating elements.
  • the actuating elements for the pusher lugs are identical to the positioning guide means provided on the filter insert.
  • a helical pressure spring surrounding the closing pin, is usefully situated as a spring between the lower end of the valve body carrier and the filter housing.
  • the present invention proposes that on the outer circumference of the valve body carrier there are provided a plurality of outward-oriented retaining cams that engage with the spring when the spring is relaxed and are disengaged from the spring when the spring is at least partially compressed. Because in the installed state the spring is always more or less compressed, in this state it has no engagement with the valve body carrier, and therefore in the installed state does not exert any immediate force on the valve body carrier.
  • valve body carrier In order to ensure a mounting of the valve body carrier in the filter housing that is secure and not sensitive to damage or loss, it is proposed that the valve body carrier is guided in the filter housing, with a lower segment, so as to be capable of axial displacement, and that the displacement path of the valve body carrier is limited in the direction of excursion relative to the filter housing by a flexible cam system.
  • the cover has on its lower side, and the upper end disk of the filter insert has on its upper side, cooperating releasable first locking connection means, rotatable relative to one another, with which a specifiable first tensile force in the axial direction can be transmitted.
  • the filter insert on the one hand, and the valve body carrier or the closing pin on the other hand have cooperating releasable second locking connection means with which a specifiable second tensile force, smaller than the first tensile force, can be transmitted in the axial direction.
  • These second locking connection means act, before a first installation of the liquid filter, to hold the valve body carrier and the closing pin on the filter insert so as to be adequately secured against unintentional loss, without hindering the later removal of the filter insert together with the cover secured thereto during the filter maintenance described in the previous paragraph.
  • a, or each, seal provided on the closing pin is a radially sealing seal, preferably a sealing ring, more preferably an O-ring.
  • a sealing ring preferably an O-ring.
  • Such seals are standardly available commercially at low cost, in a large number of different embodiments.
  • the liquid filter according to the present invention can be realized as an individual component, and can be connected to the engine block of an internal combustion engine, for example as an oil filter.
  • the closing pin has a radially sealing seal in its lower part cooperating with the discharge duct, and that the discharge duct has, in its region that cooperates with the seal during the axial movement of the closing pin, two segments having different inner diameters becoming larger in stepped fashion going from below to above, the seal being situated freely in the segment having the larger inner diameter in the opening position, and being situated in sealing fashion in the segment having the smaller inner diameter in the closing position of the closing pin.
  • the liquid filter according to the present invention can also be part of a functional module having a plurality of components.
  • the present invention proposes that the liquid filter is connected to, or can be connected to, a heat exchanger for the liquid flowing through the liquid filter, and that the closing pin has, in its lower part cooperating with the discharge duct, two radially sealing seals axially at a distance from one another, and that the discharge duct has, in its region that cooperates with the seals during the axial movement of the closing pin, two segments having different inner diameters, becoming larger in stepped fashion from below to above, the seal having the smaller diameter being situated in sealing fashion in the segment having the smaller inner diameter in the closed position of the closing pin, and being situated in open fashion in the segment having the larger inner diameter in the open position of the closing pin, the seal having the larger diameter always being situated in sealing fashion in the segment having the larger inner diameter, and a first connecting channel between the liquid filter and the heat exchanger above the seal having the larger diameter going out from the discharge duct, and a second connecting channel
  • An alternative embodiment proposes that the liquid filter is connected to, or can be connected to, a heat exchanger for the liquid flowing through the liquid filter, and that the closing pin has, in its lower part cooperating with the discharge duct, two radially sealing seals situated at an axial distance from one another having different diameters, and that the discharge duct has, in its region cooperating with the seals during the axial movement of the closing pin, three segments having different inner diameters, becoming larger going from below to above, the seal with the smaller diameter being situated in sealing fashion in the segment having the smallest inner diameter in the closing position of the closing pin, and being open in the segment having the middle inner diameter in the open position of the closing pin, the seal having the larger diameter being situated in sealing fashion in the segment having the middle inner diameter in the closing position of the closing pin and open in the segment having the largest inner diameter in the open position of the closing pin, and a first connecting channel between the liquid filter and the heat exchanger above the seal having the larger diameter going out from the discharge duct, and a second connecting channel between the heat exchanger and the
  • liquid filters are today in most cases completely or partly produced by suppliers and then supplied to customers who install the liquid filters, possibly after completion. Frequently, the customer supplies the filter housing and the supplier supplies all other parts of the liquid filter.
  • the liquid filter can be assembled from the filter housing on the one hand and a preassembled assembly on the other hand during its initial assembly, the preassembled assembly including the closing pin, the valve body carrier, the spring, the filter insert, and the cover. In this way, no loose individual parts have to be supplied and installed; the customer only has to introduce the preassembled assembly into the filter housing and connect the cover to the housing, standardly by screwing. After this, the liquid filter is immediately ready for use.
  • the present invention relates to a filter insert for a liquid filter, in particular for an oil filter of an internal combustion engine, the filter insert being made up of a hollow cylindrical filter material body enclosed at its ends by two end disks, the end disk that is the lower end disk in the installed state having a central mounting opening for mounting the filter insert onto a central valve body carrier of the liquid filter.
  • a filter insert is proposed that is characterized in that
  • the filter insert according to the present invention has specific elements that make it usable only for use in a liquid filter having the corresponding counter-elements, so that the use of unsuitable, non-fitting foreign filter inserts is in this way prevented.
  • the actuating elements are situated on the lower end disk and/or on a central supporting lattice of the filter insert, where they are usefully integrally formed on in one piece.
  • the actuating elements are preferably formed by two or more axially running ribs that protrude inward radially, or by a toothed configuration having a plurality of radially inward-protruding teeth that run axially.
  • the first positioning guide means are also preferably situated on the lower end disk and/or on a central supporting lattice of the filter insert, and usefully are also integrally formed on in one piece.
  • the actuating elements for the pusher lugs can be identical with the first positioning guide means provided on the filter insert, resulting in a favorable integration of a plurality of functions.
  • the actuating elements for the pusher lugs on the one hand and the first positioning guide means provided on the filter insert on the other hand can also be fashioned separately, facilitating an individual optimization for the particular purpose.
  • FIG. 1 through FIG. 21 show a first exemplary embodiment in various representations and various operating states
  • FIGS. 22 and 23 show a second exemplary embodiment in two different operating states
  • FIGS. 24 and 25 show a third exemplary embodiment in two different operating states
  • FIG. 26 through FIG. 33 show a fourth exemplary embodiment in various representations and various operating states
  • FIG. 34 through FIG. 40 show a fifth exemplary embodiment in various representations and various operating states.
  • FIGS. 1 through 21 show a first exemplary embodiment of a liquid filter 1 , such as an oil filter of an internal combustion engine.
  • FIG. 1 shows a preassembled assembly 6 made up of a filter insert 2 , a screw cover 11 , a closing pin 3 , a valve body carrier 40 , and a helical spring 5 .
  • Filter insert 2 is locked to cover 11 via locking connection means 11 . 2 and 22 . 2 .
  • filter insert 2 is locked to valve body carrier 40 via second locking connection means 26 and 46 .
  • Closing pin 3 is guided in axially displaceable fashion with a guide segment 30 in a lower segment of valve body carrier 40 , and is limited in its displacement path relative to valve body carrier 40 by locking tongues 31 .
  • Helical spring 5 surrounds guide segment 30 of closing pin 3 and is held thereon by holding cams 35 , as long as spring 5 is relaxed and therefore has its smallest inner diameter.
  • filter insert 2 is made up of a filter material body 22 and end disks 21 and 22 enclosing it at the ends.
  • Lower end disk 21 has a central mounting opening 21 ′ by which filter insert 2 is mounted at the front onto valve body carrier 40 .
  • a valve seat 24 for a filter bypass valve 4 is integrally formed in one piece on upper end disk 22 , on its downward-oriented side.
  • a supporting lattice 23 In the interior of filter material body 20 there is situated a supporting lattice 23 that supports filter material body 20 against collapse during filter operation.
  • Valve body carrier 40 is fashioned as an oblong lattice-shaped body made of carrier struts 42 that run in the circumferential and axial direction. On the upper end of valve body carrier 40 there is integrally formed a valve body 44 that together with valve seat 24 forms filter bypass valve 4 . A lower segment of valve body carrier 40 protrudes downward from filter insert 2 and forms a guide for guide segment 30 of closing pin 3 . In the lower end region of closing pin 3 , on this pin there are formed two radially sealing seals, axially at a distance from one another, seal 33 . 1 having a larger diameter and seal 33 . 2 having a smaller diameter.
  • Preassembled assembly 6 shown in FIG. 1 can for example be provided by a supplier to the manufacturer of internal combustion engines, who then provides the associated filter housing (not shown in FIG. 1 ) and installs assembly 6 therein.
  • FIG. 2 shows detail O from FIG. 1 in an enlarged representation.
  • one of locking tongues 31 of closing pin 3 can be seen, situated on a part of valve body carrier 40 .
  • spring 5 Around the outer circumference of guide segment 30 of closing pin 3 , there runs spring 5 , held there by holding cam 35 .
  • FIG. 3 shows detail N-N in an enlarged view.
  • valve body carrier 40 On its outer circumference, there is present, as a radially protruding bulge, second locking connection means 46 , which cooperate with second locking connection means 26 of filter insert 2 , realized as a locking tongue, and which is part of support lattice 23 of filter insert 2 .
  • FIG. 4 shows a complete liquid filter 1 in which the preassembled assembly shown in FIG. 1 is completely assembled into a filter housing 10 .
  • Housing 10 and cover 11 are fashioned with a cooperating screw threading 12 , which in FIG. 4 is screwed completely shut.
  • filter insert 2 Via its own positioning guide means 25 and positioning guide means 45 in the form of two chamfers on valve body carrier 40 in the circumferential direction, meeting one another obliquely running from top to bottom, filter insert 2 is brought into a particular position in which actuating elements 27 of filter insert 2 move into axial counterposition to pusher lugs 37 of closing pin 3 .
  • actuating elements 27 Via actuating elements 27 , a thrust force is exerted on pusher lugs 37 that brings closing pin 3 into its closed position in filter housing 10 , shown in FIG. 4 .
  • filter housing 10 has a number of channels that are used for the supply and carrying off of liquids.
  • a raw liquid inlet 15 unfiltered liquid is guided to the raw side of liquid filter 1 , situated radially outwardly from filter insert 2 .
  • the liquid here flows via a first connecting channel 14 . 1 that connects liquid filter 1 to a heat exchanger (not shown) such as an oil cooler.
  • a clean liquid outlet 16 filtered liquid that flows downward from the clean side of liquid filter 1 , i.e., from a region inside filter insert 2 , exits filter housing 10 .
  • a second connecting channel 14 . 2 connects the heat exchanger to a region of central discharge duct 13 between the two seals 33 . 1 and 33 . 2 .
  • Central discharge duct 13 has two segments, 13 . 1 having a larger diameter and 13 . 2 having a smaller diameter, in which seals 33 . 1 and 33 . 2 are situated in their sealing position, i.e., in the closed position of closing pin 3 . In this way, discharge duct 13 is sealed in liquid-tight fashion.
  • valve body carrier 40 is supported with its lower end on filter housing 10 and with its upper end on the underside of valve body carrier 40 , and exerts an upward-directed force on this valve body carrier. This force presses valve body 44 of filter bypass valve 4 into its closed position against valve seat 24 , as long as a liquid pressure difference between the raw side and the clean side remains below a threshold value.
  • valve body carrier 40 is guided so as to be capable of limited axial displacement; a limitation of the displacement path upward is formed by a flexible cam system 41 , which does permit insertion of valve body carrier 40 from above into a corresponding central opening of filter housing 10 , but prevents valve body carrier 40 from being withdrawn from filter housing 10 .
  • FIG. 5 shows detail Q from FIG. 4 , in an enlarged representation.
  • actuating element 27 exerts a thrust force, in the axial direction, on pusher lug 37 of closing pin 3 .
  • FIG. 6 shows detail R from FIG. 4 in an enlarged representation, in which the cooperation of second seal 33 . 2 of closing pin 3 with discharge duct 13 in filter housing 10 can be seen clearly.
  • the lower end of closing pin 3 still has a small distance from a step in filter housing 10 ; when the liquid filter is commissioned, a liquid pressure arises above closing pin 3 , which ensures that closing pin 3 moves, with its lower end underneath seal 33 . 2 , until reaching a stop on housing 10 .
  • FIG. 7 shows detail W from FIG. 4 in an enlarged view.
  • helical spring 5 is supported with its lower side on filter housing 10 and with its upper side on valve body carrier 40 .
  • FIG. 8 shows previously described liquid filter 1 , now in a state in which filter bypass valve 4 is open.
  • This open position of filter bypass valve 4 occurs when there arises between the raw side, connected to raw liquid inlet 15 , and the clean side, connected to clean liquid outlet 16 , of liquid filter 1 a pressure difference that exceeds a boundary value, for example as a result of a clogging of filter material body 20 with filtered-out dirt particles.
  • the force produced by the pressure difference presses on the upper side of valve body 44 , and thus moves valve body carrier 40 against the force of spring 5 in the opening direction, i.e., downward.
  • valve body 44 comes to be situated at a distance from its valve seat 24 on upper end disk 23 of filter insert 2 .
  • An immediate flow path is now open from the raw side to the clean side of liquid filter 13 .
  • closing pin 3 maintains its position unchanged.
  • FIG. 9 shows detail Y from FIG. 8 , in which open filter bypass valve 4 is shown in an enlarged view.
  • the upper end of valve body carrier 40 with valve body 44 is visible.
  • upper end disk 22 of filter insert 2 with its valve seat 24 there is situated upper end disk 22 of filter insert 2 with its valve seat 24 .
  • valve body 44 is moved away from valve seat 24 , and filter bypass valve 4 is open.
  • FIG. 10 shows detail X from FIG. 8 , in an enlarged view.
  • a small part of filter housing 10 can be seen, in whose central opening lower end disk 21 of filter insert 2 is inserted in sealing fashion.
  • filter insert 2 is mounted, with central mounting opening 21 ′, onto valve body carrier 40 , which runs from below to above into filter insert 2 .
  • the upper part of guide segment 30 of closing pin 3 is visible, whose uppermost end is formed by pusher lug 37 .
  • cam system 41 of valve body carrier 40 is also visible.
  • FIG. 11 shows liquid filter 1 during a maintenance session, during which cover 11 is screwed off from filter housing 10 .
  • Filter insert 2 is lifted out along with it via locking connecting means 11 . 2 and 22 . 2 .
  • valve body carrier 40 pushes valve body carrier 40 , which is now relieved of stress axially at its upper side due to the removal of cover 11 , upward until its cam system 41 meets the associated step of filter housing 10 , thereby preventing further displacement of valve body carrier 40 upward.
  • closing pin 3 Via locking tongues 31 , described on the basis of FIGS. 1 and 2 and not visible in FIG. 11 , closing pin 3 is concomitantly moved upward by valve body carrier 40 .
  • lower seal 33 . 2 moves out of segment 13 . 2 of discharge duct 13 having the smaller diameter into segment 13 . 1 of discharge duct 13 having the larger diameter, thus causing seal 33 . 2 to become free of filter housing 10 and to no longer seal.
  • Upper seal 33 . 1 remains inside segment 13 . 1 of discharge duct 13 having the larger diameter, and thus continues to seal.
  • FIG. 12 detail P from FIG. 11 is shown in an enlarged view.
  • the cooperation of the second locking connecting means 26 and 46 is clear.
  • FIG. 13 shows the state after the removal of cover 11 and the removal of filter insert 2 , connected thereto, from filter housing 10 .
  • Spring 5 now presses valve body carrier 40 upward up to the stop point of its cam system 41 on filter housing 10 .
  • Closing pin 3 carried along upward by the valve body carrier 40 , continues to be in its open position.
  • liquid in filter housing 10 flows through raw liquid inlet 15 , through first connecting channel 14 . 1 and through the heat exchanger connected thereto (not shown here), via second connecting channel 14 . 2 , past lower seal 33 . 2 , through discharge duct 13 , and, in the case of an oil filter, preferably into the oil pan of an associated internal combustion engine.
  • FIG. 14 shows the partly disassembled liquid filter of FIG. 13 , in a longitudinal section rotated by 90°.
  • closing pin 3 In the lower part of filter housing 10 there is again situated closing pin 3 with its two seals 33 . 1 and 33 . 2 , of which the latter stands free from filter housing 10 and thus releases discharge duct 13 .
  • Guide segment 30 forming the upper part of closing pin 3 , is guided axially in the lower part of valve body carrier 40 , where the capacity for relative axial displacement is limited by locking tongues 31 .
  • locking tongues 31 provide rotational securing of closing pin 3 and valve body carrier 40 relative to one another.
  • On the part of valve body carrier 40 situated above guide segment 30 its positioning guide means 45 can be seen, in the form of the chamfers running over its outer circumference and falling off in opposite directions.
  • FIG. 15 shows detail U from FIG. 13 in an enlarged view, in which in particular it can be seen that cam system 41 lies against the associated step of filter housing 10 .
  • FIG. 16 shows detail V from FIG. 14 in an enlarged view.
  • the interaction of locking tongues 31 with valve body carrier 40 can be seen clearly, whereby closing pin 3 is carried along upward when there is an upward movement of valve body carrier 40 .
  • FIG. 17 shows, in a partially broken-away perspective view, filter housing 10 together with valve body carrier 40 inserted therein. Facing the observer, on the side of housing 10 raw liquid inlet 15 running therein can be seen. On the valve body carrier 40 , facing the observer positioning guide means 45 can be seen, which force-guide positioning guide means 25 on filter insert 2 , which here are at the same time actuating elements 27 , into a position in the circumferential direction ready for engagement with pusher lugs 37 of closing pin 3 .
  • FIG. 18 shows an enlarged segment of liquid filter 1 in eccentric longitudinal section.
  • Filter insert 2 is shown in a state during its placement onto valve body carrier 40 , where filter insert 2 , seen in the circumferential direction, has not yet reached its engagement-ready position relative to closing pin 3 .
  • positioning guide means 25 of filter insert 2 have been placed from above, in the axial direction, into an intermediate position onto positioning guide means 45 of valve body carrier 40 .
  • filter insert 2 rotates in the clockwise direction and at the same time moves further downward, and positioning guide means 25 slide onto positioning guide means 45 .
  • positioning guide means 25 which at the same time form actuating elements 27 , are situated in fitting counterposition to pusher lugs 37 on closing pin 3 .
  • FIG. 19 shows liquid filter 1 in a state at the beginning of assembly after a filter maintenance.
  • Cover 11 of filter housing 10 together with filter insert 2 locked thereto, is screwed to a small extent into screw threading 12 .
  • actuating elements 27 of filter insert 2 are still at an axial distance from pusher lugs 37 of closing pin 3 .
  • Valve body carrier 40 is still in its position pushed out upward by spring 5 , in which its cam system 41 lies against filter housing 10 .
  • Closing pin 3 carried along upward by valve body carrier 40 , is also still in its raised opening position, in which it is held by the friction of upper seal 33 . 1 .
  • FIG. 20 shows detail X from FIG. 19 in an enlarged view, such that on the one hand the stop of cam system 41 on filter housing 10 and on the other hand the axial distance between actuating elements 27 and pusher lugs 37 is clear.
  • FIG. 21 shows liquid filter 1 from FIG. 19 , now in a state after cover 11 has been screwed somewhat further into filter housing 10 .
  • actuating elements 27 are now just axially seated on pusher lugs 37 .
  • Valve body carrier 40 has already been moved concomitantly downward by a small distance through the seating of valve body 44 on sealing seat 24 , which can be seen in that now cam system 41 already has a slight axial distance downward from the associated step in filter housing 10 .
  • the movement of cover 11 downward has still not been transmitted to closing pin 3 .
  • FIGS. 22 and 23 show a second exemplary embodiment, modified compared to the example shown in the preceding Figures.
  • filter housing 10 of liquid filter 1 according to FIGS. 22 and 23 has, in discharge duct 13 , a third segment 13 . 3 that is situated above segments 13 . 1 and 13 . 2 and that has the largest inner diameter compared to the two segments 13 . 1 and 13 . 2 .
  • This segment 13 . 3 terminates upwardly at segment 13 . 1 .
  • seal 33 . 1 is situated in sealing fashion in segment 13 . 1 and seal 33 . 2 is situated in sealing fashion in segment 13 . 2 of discharge duct 13 .
  • FIG. 23 shows the liquid filter from FIG. 22 after the removal of cover 11 and removal of filter insert 2 .
  • spring 5 presses valve body carrier 40 upward until the stop point of its cam system 41 on filter housing 10 , whereby valve body carrier 40 also carries closing pin 3 upward into its uppermost position.
  • upper seal 33 . 1 is situated freely in segment 13 . 3
  • lower seal 33 . 2 is situated freely in segment 13 . 1 of discharge duct 13 .
  • a runoff path for liquid is released from filter housing 10 through its central opening along the lower part of valve body carrier 40 and along closing pin 3 , past its two seals 33 . 1 and 33 . 2 , into discharge duct 13 .
  • liquid filter 1 according to FIGS. 22 and 23 corresponds to the previously explained exemplary embodiment, to whose description reference is made.
  • FIGS. 24 and 25 A third exemplary embodiment of the present invention is shown in FIGS. 24 and 25 .
  • Characteristic for this embodiment of liquid filter 1 is that here closing pin 3 has only one radially sealing seal 33 , and that discharge duct 33 in filter housing 10 has only two segments 13 . 1 and 13 . 3 for cooperation with seal 33 .
  • liquid filter 1 is shown in its operating position in which filter insert 2 is installed in filter housing 10 and cover 11 is screwed tightly onto filter housing 10 .
  • actuating elements 27 press against pusher lugs 37 of closing pin 3 , and in this way move it downward, or holds it in its lower position.
  • seal 33 is situated in sealing fashion in segment 13 . 1 of discharge duct 13 , which is sealed in liquid-tight fashion thereby.
  • Liquid that is to be filtered moves through raw liquid inlet 15 into liquid filter 1 , and leaves the filter, after flowing through filter material body 20 of filter insert 2 , through clean liquid outlet 16 .
  • a heat exchanger is not assigned to liquid filter 1 .
  • FIG. 25 the liquid filter is shown from FIG. 24 after removal of cover 11 and removal of filter insert 2 .
  • spring 5 has now pressed valve body carrier 40 upward until the stop of its cam system 41 on filter housing 10 .
  • closing pin 3 Via locking tongues system 31 , shown and explained in FIGS. 1, 2, 14, and 16 , and not visible in FIG. 25 , closing pin 3 is carried along upward, into its uppermost position shown in FIG. 25 .
  • seal 33 is situated freely in segment 13 . 3 of discharge duct 13 , so that this duct is open.
  • Liquid in filter housing 10 can in this way flow through the central opening of housing 10 , along the lower part of valve body carrier 40 , and along closing pin 3 , past seal 33 , through discharge duct 13 .
  • liquid filter 1 according to FIGS. 24 and 25 corresponds to the previously explained exemplary embodiments, to whose description reference is made.
  • FIGS. 26 through 33 of the drawing show a fourth exemplary embodiment of liquid filter 1 .
  • it is characteristic that it does not have any positioning guide means on filter insert 2 and on the valve body carrier 40 .
  • actuating elements 27 on the lower side of lower end disk 21 of filter insert 2 are fashioned as annular circumferential collars that, in any rotational position of filter insert 2 relative to valve body carrier 40 and to closing pin 3 , enter into engagement with pusher lugs 37 thereof.
  • liquid filter 1 is shown in a state at the beginning of assembly in the context of maintenance after fastening a fresh filter insert 2 in cover 11 and after an initial screwing of cover 11 into filter housing 10 . Due to the previous removal of cover 11 and removal of filter insert 2 , closing pin 3 and the valve body carrier 40 are still in their respective uppermost position. In the state according to FIG. 26 , actuating elements 27 still have a small axial distance from pusher lugs 37 of closing pin 3 .
  • FIG. 27 shows detail X from FIG. 26 in an enlarged view.
  • a part of filter housing 10 is visible.
  • the end region of filter insert 2 can be seen, namely parts of its lower end disk 21 , of filter material body 20 , and of supporting lattice 23 .
  • lower end disk 21 has central mounting opening 21 ′, which is limited at the lower side by the circumferential collar forming actuating elements 27 .
  • FIG. 28 liquid filter 1 from FIG. 26 is shown in a state that arises after cover 11 is screwed slightly further into filter housing 10 .
  • Filter insert 2 is now moved downward, together with cover 11 , far enough that actuating elements 27 just meet pusher lugs 37 of closing pin 3 .
  • valve body carrier 40 is already seated on valve seat 24 with its valve body 44 , valve body carrier 40 is already moved downward by a small distance, which can be seen in that the cam system 41 now has a small axial distance from the associated step of filter housing 10 .
  • FIG. 30 shows liquid filter 1 , now in its completely assembled state, in which cover 11 is screwed tightly to filter housing 10 .
  • closing pin 3 is pressed into its lowermost position, as is valve body carrier 40 by filter insert 2 .
  • seals 33 . 1 and 33 . 2 are situated in sealing position in segments 13 . 1 and 13 . 2 of discharge duct 13 , whereby this duct is tightly sealed.
  • Filter insert 2 is seated with its lower end disk 21 in sealing fashion in the central opening of filter housing 10 , and filter bypass valve 4 at the upper end of valve body carrier 40 is closed, and as a result a flow connection from the raw side to the clean side exists only through filter material body 20 of filter insert 2 .
  • FIG. 31 shows detail Z from FIG. 30 in an enlarged view.
  • FIG. 32 shows liquid filter 1 from FIG. 30 in a longitudinal section rotated by 90° along the line A-A.
  • the position of locking tongues 31 on guide segment 30 of closing pin 3 in openings of the lower region of valve body carrier 40 can be seen, whereby valve body carrier 40 guides closing pin 3 so as to be capable of limited axial displacement.
  • FIG. 33 detail W from FIG. 32 is shown in an enlarged view.
  • liquid filter 1 according to FIGS. 26 through 33 corresponds to the above-explained first exemplary embodiment, to whose description reference is made.
  • FIGS. 34 through 40 show a fifth exemplary embodiment of the present invention.
  • This exemplary embodiment corresponds essentially to the previously described fourth exemplary embodiment; in the fifth exemplary embodiment, the shape of actuating elements 27 on lower end disk 21 of filter insert 2 is different. Adapted thereto, valve body carrier 40 is also realized somewhat differently than in the fourth exemplary embodiment.
  • FIG. 34 shows liquid filter 1 in its normal operating position.
  • Cover 11 is connected to filter housing 10 together with filter insert 2 .
  • closing pin 3 is pressed downward into its closing position, and valve body carrier 40 , loaded by the force of spring 5 , lies with its valve body 44 against valve seat 24 of upper end disk 22 of filter insert 2 .
  • FIG. 35 shows detail X from FIG. 34 in an enlarged view.
  • FIG. 36 shows a section through the liquid filter according to the line A-A in FIG. 35 .
  • Filter housing 10 is sectioned radially outwardly.
  • lower end disk 21 Radially inwardly, lower end disk 21 , with its central mounting opening 21 ′, is situated therein.
  • mounting opening 21 ′ With mounting opening 21 ′, lower end disk 21 is mounted onto valve body carrier 40 , and with said lower end disk the rest of filter insert 2 (not visible here) is mounted onto the valve body carrier 40 .
  • Actuating elements 27 on the inner circumference of central mounting opening 21 ′ of lower end disk 21 are here formed by radially inward-protruding teeth that are at a distance from one another in the circumferential direction.
  • Each pair of oppositely situated teeth fit between two short ribs that run in the axial direction and that form positioning guide means 45 on valve body carrier 40 . In this way, a key-lock system is realized that prevents the use of unsuitable foreign filter inserts in liquid filter 1 according to the present invention.
  • FIG. 37 shows a view of a valve body carrier 40 as an individual part.
  • Valve body carrier 40 has the form of a lattice-shaped hollow cylindrical body made up of carrier struts 42 that run in the circumferential direction and in the longitudinal direction.
  • dome-shaped valve body 44 is integrally formed on in one piece.
  • second locking connection means 46 are situated in the form of a circumferential locking bulge.
  • Still further downward there follow positioning guide means 45 on the outer circumference of valve body carrier 40 which cooperate with actuating elements 27 of filter insert 2 as described above.
  • cam system 41 can be seen having the two oppositely situated flexible locking tongues that carry the cams.
  • FIG. 38 shows lower end disk 21 of filter insert 2 of liquid filter 1 from FIG. 34 , in cross section as an individual part.
  • the toothing situated on the inner circumference of central mounting opening 21 ′, for the formation of actuating elements 27 can be seen particularly clearly.
  • the individual teeth are distributed uniformly in the circumferential direction and run in the axial direction of end disk 21 .
  • Each tooth has on its lower end run-in chamfers that facilitate the running in of the two teeth cooperating with positioning guide means 45 on valve body carrier 40 .
  • FIG. 39 shows a plan view of end disk 21 .
  • the regular configuration of the teeth, forming actuating elements 27 of the toothing on the inner circumference of central mounting opening 21 ′ can be seen clearly.
  • FIG. 40 shows, in a perspective view, the cooperation of closing pin 3 , valve body carrier 40 , and end disk 21 .
  • valve body carrier 40 can be seen with its valve body 44 and with second locking connection means 46 .
  • Closing pin 3 is inserted from below into valve body carrier 40 and is locked there.
  • end disk 21 is mounted onto valve body carrier 40 , said end disk cooperating, via its tooth-shaped actuating elements 27 , with positioning guide means 45 on valve body carrier 40 , in the manner of a key-lock system. Via each of the actuating elements 27 that come to be situated between positioning guide means 45 , closing pin 3 is actuated downward in the direction of insertion relative to filter housing 10 .
  • filter housing 10 of liquid filter 1 is preferably made of a light metal such as aluminum, and is usefully produced using a die-casting method.
  • Connecting pin 3 and valve body carrier 40 , as well as end disks 21 and 22 and supporting lattice 23 of filter insert 2 are preferably made of a plastic such as polyamide, for reasons of weight and disposability, and are usefully injection-molded parts.
US14/411,421 2012-06-26 2013-06-21 Liquid filter with a filter bypass valve and with a central discharge duct, and filter insert for a liquid filter Active 2034-05-02 US9644508B2 (en)

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DE102012210834 2012-06-26
DE102012210834.3 2012-06-26
DE102012210834.3A DE102012210834A1 (de) 2012-06-26 2012-06-26 Flüssigkeitsfilter mit einem Filterumgehungsventil und einem zentralen Ablasskanal und Filtereinsatz für ein Flüssigkeitsfilter
PCT/EP2013/062968 WO2014001210A2 (de) 2012-06-26 2013-06-21 Flüssigkeitsfilter mit einem filterumgehungsventil und einem zentralen ablasskanal und filtereinsatz für einen flüssigkeitsfilter

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US20150337695A1 US20150337695A1 (en) 2015-11-26
US9644508B2 true US9644508B2 (en) 2017-05-09

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US (1) US9644508B2 (de)
EP (1) EP2864016B1 (de)
CN (1) CN104918675B (de)
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WO (1) WO2014001210A2 (de)

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FR3078895B1 (fr) * 2018-03-19 2022-01-21 Sogefi Filtration Spa Filtre et cartouche amovible, avec deux niveaux d'etancheite dans un puits de la base du filtre
DE102018009928A1 (de) 2018-12-17 2020-06-18 Daimler Ag Ölfilter für einen Kraftwagen und Filterkartusche für einen Ölfilter
US11542844B2 (en) * 2019-09-20 2023-01-03 Raytheon Technologies Corporation Integrated lubricating fluid filtering and metering device
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CN104918675B (zh) 2016-09-14
US20150337695A1 (en) 2015-11-26
WO2014001210A2 (de) 2014-01-03
EP2864016B1 (de) 2018-05-16
WO2014001210A3 (de) 2014-04-17
CN104918675A (zh) 2015-09-16
EP2864016A2 (de) 2015-04-29

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